These extra heavy duty braked castors have a carrying capacity 400kgs each, overall height 200mm, 4 x M10 Bolt fixing plate. Heavy Duty industrial castors are made of a heavy duty pressed steel zinc plated, housing a 160mm solid rubber wheel mounted on an aluminum centre. These castor wheels runs on ball journal bearings, making the heavier loads easier to move. The foot operated wheel brake simultaneously brakes both the swivel castor head and the wheel. These castors are suitable for a range of heavy industrial applications and combining 4 makes them able to carry over 1 tonne castors.